CP Assessment

When a molecule like butane burns, what happens to the carbon and hydrogen atoms after the chemical change?

• A: They join back together to make more butane.
• B: The carbon and hydrogen each join with oxygen to make carbon dioxide and water.
• C: They float out in the smoke, as isolated atoms.
• D: The carbon and hydrogen atoms disappear as the fuel gets used up.

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Honors Assessment

Which of the following statements best describes the chemical changes involved in the combustion of nonane?

• A: When nonane burns completely, nine carbon dioxide molecules result.
• B: When nonane burns completely, ten water molecules result.
• C: When nonane burns completely, 14 oxygen molecules are consumed.
• D: Hey! All of these statements are true!

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